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Fig. 39: Profit margin in relation to tariff and treatment
in lamps and bulbs as well as the labour costs, are contributing much to the variable and fixed costs beside the costs for packing and marketing and CO2 costs.
A detailed composition of the variable costs at each treatment is shown in Tab. 8.
The profit margin was dependent on the treatment (Fig. 39). Profit margin was with about 11,000 ISK/m2 lowest at “240 HPS, Diamantino” and “240 HPS, ungrafted Encore”. However, the profit margin rose to 14,000 ISK/m2, when instead of ungrafted tomatoes (“240 HPS, ungrafted Encore”), grafted tomatoes (“240 HPS, grafted Encore”) are used. That means, grafting of tomatoes increased the profit margin by about 3,000 ISK/m2. An increase of the light intensity (from 240 W/m2 to 300 W/m2), in addition to a higher top density, a higher temperature and CO2 amount increased the profit margin only slightly. A larger use (higher tariff: “VA 410” compared to “VA 210”, “VA 430” compared to “VA 230”), did not influence the profit margin. Also, it did not matter if the greenhouse is situated in an urban or rural area, the profit margin was comparable. However, at a higher tariff there was a surprisingly small advantage of rural areas due to the state subsidies (Fig. 39).
